Chilian mill.



S. H.`PITKIN & J. H. STRATTON.

I ENTORS WIT ESSES ad S. H. PITKIN 6v J. H. STRATTON.

GHILIAN MILL.

APPLICATION FILED JULY 29, 1911.

Patented July 9, 1912.

WITNESSES S. H. PITKIN & J. H. STRATTON.

GHILIAN MILL.

APPLICATION FILED JULY 29, 1911. 1,031,730. Patented July 9, 1912.

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S. H. PITKIVN & J. H.. STRATTON.

GHILIAN MILL.-

APPLICATION FILED JULY 29, 1911.

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. seriously impair STEPHEN I-I. PITKIN ANID JAMES I-I. STRATTON, OFCLEVELAND, OHIO, ASSIG'NORS '10 THE WELLMAN-SEAVER-MORGAN COMPANY, OFCLEVELAND, OHIO.

CHILIAN MILL.

Specification of Letters Patent.

Patented Jaiye, i912.

Application filed July 29, 1911. Serial No. 641,366.

provements in Chilian Mills; and we do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to'make and usethe same.

Our invention relates to an improvement in Chilian mills and moreparticularly to improvements on the construction disclosed in our PatentNo. 7 92,161 granted June 13th, 1905.

In our patented apparatus, and in others in which the crushing rollersand their dies travel in a circular path, upon a die ring,

there is a decided tendency to uneven wear on the die ring, resultingingrooves, which the efficiency of the mill, and the object of thisinvention is to obviate this tendency by providing means for changingthe position of the crushing rollers, whereby the center of gravity ofthe latter travels in an elliptical path, the short diameter of theellipse being across or transversely of the die.

Vith this object in view our invention consists in means for impartingto the crushing rollers a horizontal' traversing motion across the faceof the die ring.

Our invention further consists in the parts and combination of parts aswill be more fully described and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in vertical section ofour improved mill. Fig. 2 is a view partly in top plan and partly insection. Fig. 3 is a view in section on the line A A, of Fig. 1. Fig. 4is carries the mortar 2, having a centrally lo-l cated hollow hub 3,which, as shown, eX- tends above the highest point of the mortar, anddown in approximately the plane of the base casting 1.

4L is a spindle, provided with a threaded lower end which `latterengages internal threads formed in the nut or worm wheel 5, which latteris carried by bracket 6 bolted to the underside of base casting 1 thesaid spindle having a feather and groove connec tion with the bracketwhereby it is held against rotation. Mounted in bearings carried bybracket 6 is the worm shaft which meshes with the teeth of worm wheel 5,and operates by its rotation, to rotate the worm wheel and elevate orlower spindle 4. The spindle is provided at its upper end with a thrustring 8 for taking the vertical thrust from the driving head 9, throughanti-friction or ball bearings 9a located on both sides of the thrustring. The ymain driving gear 10 is clamped or keyed to the hollowdriving shaft or sleeve 11, which latter incloses the spindle, and issupported against vertical movement by the hub of gear 10 restingbetween bearing 11EL and the lower end of hub 3 of the mortar 2, bothbearing surfaces being preferably provided with bronze bushings. Thedrive head 9 is secured to the upper end of this shaft or sleeve 11, soas to rotate therewith and is connected by the means, to be nowdescribed, with a series of crushing rollers, so that when the hollowshaft is rotated, the driving head will rotate therewith and carry thecrushing rollers.

Located within the mortar 2 is the die ring 12 on which the tires 13 ofthree crushing' rollers 121 travel. The rollers 14 are each mounted onan axle 14a, each of which is connected to rotating head 15, by ahorizontal pivot 16 which permits the roller to freely rise and fall inits movements over the ring die 12.v i

The rotating head 15 is connected to' the driving head 9 by a link 17,so that, as the driving head is rotated by its direct connection withdriving sleeve 11, the rotating head 15 will move simultaneouslytherewith. The rotating head has a central opening embracing the cam hub18 of the gear 19, which latter is mounted to rotate on the hub ofdriving head 9, hence it will be seen that as the gear 19 and its cam 18are rotated, an oscillating motion will be imparted to the rotating head15, which as before explained carries the series of crushing rollers,the link connection 17, between the driving heads 9 and the rotatinghead permitting the additional movement imparted to it by the cam 18.

Mounted in brackets 2() carried by the driving head 9 are the shafts 21,each having a pinion 22, at its upper end, meshing with pinion 19, andeach provided at its lower end with a'pinion 23 meshing with theelongated gear 24 fixed to the upwardly projecting portion of the hub 3of the mortar 2. There are three brackets 20, carrying shafts 21 andthree pinions 22 and 23, and they together with the gears 19 and 24constitute a planet-ary drive for the eccentric hub 18, so that as thedriving head 9 is revolved, the .hub 18 will be slowly revolved might beresorted to in the around t-he hub of said head, thus imparting anoscillating motion to the rotating head 15 and to the entire series ofrollers 14, carried by said head 15. By this arrangement the rollersinstead of traversing in a circular path, and thus wearing portions onlyof the ring die, are caused to move in a constantly changing ellipticalpath, so that all parts of the ring die and ring are equally subjectedto wear.

In the construction shown in Figs. 5, 6 and 7, we have the sameplanetary arrangement, for imparting a lateral traversing movement tothe rollers 14, but instead of employing a rotating head carrying theroller axles, we pivotally connect each of the latter to a sliding block25 carried in brackets -26 bolted to the driving head 9, and theeccentric 18a for imparting lateral movement to the rollers, instead ofpositively moving the rollers in and out, is annular in form and engagesthe outer face only of shoes or rollers 26a, which are trunnioned to thesliding blocks 25, and operate to draw the blocks 25 and the connectingrollers inwardly toward the central shaft, the rollers being maintainedin their extreme outward positions by centrifugal force.

With these constructions the lateral movement of the rollers carries theulatter in a constantly changing elliptical path thus eliminating alltendency to the formation of grooves in the crushing surfaces.

It is evident that many slight changes relative arrangement of partsherein shown and described without departing from the spirit and scopeof our invention. Hence we would have it understood that we do not wishto confine ourselves to the exact construction and arlr)angement ofparts shown and described,

Having fully described our invention what we claim as new and desire tosecure by Letters Patent, is

1. The combination with a stationary mortar, of a series of rollers,rotating means, devices connecting the rotating means and rollers, theconnection between the rollers and rotating means being loose to permitthe rollers to give or yield vertically and means for imparting lateralmovement to the rotating rollers.

2. The combination with a stationary mortar, of a central shaft, meansfor rotating said shaft, a series of rollers, means connecting saidshaft and the rollers for rotating the latter, and means actuated by therotation of the shaft for imparting lateral movement to the rollers.

3. The combination with a mortar, a central rotating shaft, a drivinghead secured to said shaft, a series of crushing rollers, an axle foreach roll, and means intermediate said driving head and axles andloosely connecting them, and means for imparting lateral movement to therollers. e

4. The combination with a fixedmortar, a ring die therein, a centralshaft, means for rotating the latter, a series of rollers, an axle foreach roller and means connecting the axles and the shaft, and means forimparting a longitudinal movement to the axles as the latter are carriedaround by the shaft.

5. The combination with a mortar, a shaft, means for rotating thelatter, a driving head secured to said shaft, a series of crushingrollers, an axle for each roller, means loosely connecting the axleswith the driving head, a cam for shifting the axles longitudinally, andgearing actuated by the rotation of the driving head for actuating saidcam.

6. The combination with a mortar, a shaft, a driving head and a rotatinghead having a loose connection with the driving head, of a series ofaxles carried by said rotating head and having a free up and downmovement, a crushing roller on each axle and means for shifting saidrotating head laterally while it is rotating for imparting a lateralmovement to the traversing crushing rollers.

7. The combination with a mortar, a shaft, a driving head, a rotatinghead, and a link connecting the two heads whereby they are caused torotate in unison, of a series of axles having pivotal connection withthe rotating head, a crushing roller on each axle, a cam for moving therotating head and its series of crushing rollers in a horizontaldirection and means for rotating the cam.l

8. The combination with a mortar, a driving shaft, a driving head and arotating head, of a series of stub axles pivoted to said rotating head,a crushing roller on each axle, a cam mounted to rotate on said drivinghead and engaging the rotating head for shifting the latter and thecrushing rolls specificatonin the presence of tWo subscriblaterailyd, agear rigd With said carni, sin) Xleld ing Witnesses. gear an a series opinions carrie y t e driving head and connecting the fixed gear and thegea-r on the cam, whereby the rot-ation of the driving head imparts arotary Wvitnesses: motion to Jche cam. HERBERT D. GLIDDEN,

In testimony whereof, We have signed this H. A. PELOUBET.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

